# 创建时间：2025/4/29 星期二 20:26
# 创建人：李德才
list = ["a", "b", "c", "d", "e"]

print("======================遍历===========================")

for i in list:
    print(i)

print("======================判断===========================")

print("a" in list)
print("f" not in list)